Finding the Fourth Proportional to 2,345.75, 3,238.55 and 1,638.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,345.75 : 3,238.55 = 1,638.82 : x
2. Step 2: Convert to fraction form
   2,345.75/3,238.55 = 1,638.82/x
3. Step 3: Cross multiply
   2,345.75x = 3,238.55 × 1,638.82
4. Step 4: Simplify right side
   2,345.75x = 5,307,400.51
5. Step 5: Solve for x
   x = 5,307,400.51/2,345.75
6. Step 6: Final answer
   x = 2,262.56